Wall telephone



Filed Jan. 28. 1924 Zia/15mm 1,627,393 I W. KAISLING WALL EEEEE BONE Patented May 3, 1927.

* UNITED STATES PATENT WILLIAM KArs imGio-F CHICAGO, ILLINOIS, Assn-Non. re. KEL'LQGG swmennonm AND surety, company, or .crucneo, iLLINOIS, A eo-ImonA'rIem or rLLINoIs.

WAL TELEPHONE- Application filed January 28, 1924. Serial No. 688,924.

invention relates to telephone wall sets of the type in which'the apparatus is'mountin a pressed steel box and an object of my invention is the provision of a novel looking means for securing the hinged lid of the box in position to the b"ase,when the same is closed. The'locking means ofmy invention is simple in construction and positively locks the lid of the box to the base or back plate 'when the lid is closed.

A feature of my invention isthe provision of a screw locking member rotatably sup ported. in a suitable bracket secured to the base or back plate of the box which in assio'ciation with suitable slot and orificein the hinge-d lid or cover "of thetelephon'e box permits the lid or cover to be heldin its closed or lockedpositi'on against the base or back-plate of the telephone box.

For a more completeunderstanding of my invention reference maybe had to the accompanying drawing in which like reference characters in the several views denote like parts 'an'din' which" I Fig. 1 is a plan view of a 'tel'e hone box provided with the lock of my invention illustrating-the cover or lid in its locked position;

Fig. 2 is a sectional view'alongthe line 2-2 of Fig. 1 to clearly illustratethe construction of the lockmeans;

Fig. 3 is "a fragm'entary'plan view of the lid or cover of the base open, and

Fig. 4 is a right side view of Fig. 3.

Referring now more in detail. to my invention as illustrated in the accompanying drawings, the telephone wall box B comprises a base or back plate 2 preferably formed of pressed metal which supports the usual substation telephone apparatus such as the condenser 3, induction coil 4, mounting rack 5 and the other apparatus that is contained in a telephone substation box all of which is well known in the art. An angu lar bracket 6 positioned at the upper edge of the base or backplate 2 equi-distant for its respective sides is secured to the said base or back plate 2 by means of suitable rivets 7. The leg 8 of the bracket 6 is provided with a suitable tapped orifice 9 which is adapted to receive the lock screw 10, the end 11 of which is slightly expanded to prevent it from being removed from its tapped orifice 9 in the leg 8 of the bracket 6.

The movable box cover or lid 12 is formed of pressed metal is secured to the base or back plate 2 by means of suitable hinges (not shown) to permit the same to be dropped down so that the apparatus mounted on the base or back plate 2 is accessible, The lid or cover 12 is provided with an orifice 13 provided with a countersunk portion 1 1, made by means of a suitableforming' operat on. Thehea-d 115 of the screw 10 rests, when the cover or lid is in'its closed'position, in "said countersunk portion 14, A slot extension 16 extends from the orifice 133. and is in alignment with the screw 10, The slot 16 is slightly narrower than the diameter of the orifice 13 and ofa width to receive the screw 10 when the cover or'lid' 12' is closed from its d pp d or Open In this position'the coveris locked and to permit it to be dropped for access to the a paratus mounted on thebase or back plate 2,-jthe screw 10 is turned until "its head 15 isclear' ofthe slot extension 16 as illustrated indotted line in F ig 2. When the screw 10 is in this position its body'portion 17 which is of a sizejtopassthrough the slot extension 1 ne pe mits t e "cove o lid 12 to 'be dropp-ed. Toreturn the lid or cover 12 to its closed position the said lid 12 is moved upward, the body 17 of the said screw 10 passing through the slot 16 and again entering the orifice 13. The screw 10 when in this position may now be screwed down with its head resting in the countersunk 1 of the orifice 13 placing the head portion 15 of the screw 10 in alignment with the slot extension andas the diameter of the head 15 of the screw 10 is larger than the slot extension 16 the cover or lid 12 is held in its closed position. The tapered portion of the head of the screw drawing down into the tapered portion of the countersunk hole 13 draws the lid of the box into exact alignment and firmly secures the same in position. If when the lid of the box is closed thescrew 10 does not exactly line up in the center of the orifice 13 and hold the vided with an offset portion 6 against which the edge of the lid or cover 12 rests when in its closed position.

While I have illustrated the screw locking member of my invention in connection with a telephone wall set it is to be understood that the screw lock of my invention is applicable to a variety of uses other than that illustrated and described, and I therefore, do not wish to be limited to the exact structure as illustrated and described, but aim to cover all. such changes and modifications as come within the spirit and scope of the appended claims.

v hat I claim as new and desire to secure by United States Letters Patent is:

1. In a subscribers telephone set, the com bination with a base or back plate, of a cover hinged thereon, a bracket secured to said back plate and a rotatable screw supported thereby, an orifice in said cover and a slot extension from said orifice in alignment with said screw to permit entrance of said screw in said orifice when said cover is closed, said screw having a tapered portion adapted to engage a tapered portion of said orifice to permit the head of said screw to be depressed in said cover.

2, In a subscribers telephone set, the combination with a back plate, of a cover hinged thereto, a bracket supported on said back plate and a lock screw in said bracket, a countersunk orifice in said cover and a slot extension from said orifice of a width to permit the passage of the body of the screw through said slot extension into said orifice when said cover is closed, the head of said screw resting in said countersunk orifice when said screw is tightened to lock said cover in its closed position.

3. In a subscribers telephone set, the combination with a back plate, of a cover hinged thereto, a bracket supported on said back plate and a lock screw supported by said bracket, a countersunk orifice in said cover and a slot extension from said orifice of a width to permit the passage of the body of the screw through said slot extension when said lock screw is raised from its locked position, said orifice and screw forming means to permit the said cover to be dropped to permit access to the apparatus of the set.

at. In a subscribers telephone set, the combination with a back plate, of a cover hinged thereto, a bracket supported on said back plate and a lock screw having a tapered head portionsupported by said bracket, a countersunk orifice in said cover and a slot extension from said orifice of awidth to permit the passage of the body of the screw through said slot extension when said lock screw is raised to permit the opening or closing of said cover from an open or closed position, said body portion of said screw entering said countersunk orifice, the tapered head portion of said screw resting in said countersunk of said orifice when the said lock screw is tightened to lock said cover in its closed position.

5. A device of the character described including an enclosing member, a cover member for said enclosing member and hinged thereto, an orifice having a tapered portion for one of said members and a screw for the other of said members and having a tapered portion adapted to fit into the tapered portion of said orifice to secure one of said members to the other of said members.

Signed by me at Chicago, in the county of Cook and State of Illinois, this 25th day of January, 1924:.

WILLIAM KAISLING. 

